# Copyright 2023 Huawei Technologies Co., Ltd
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# ============================================================================


from toolz.sandbox import unzip


data_column = [
    'img_feat',
    'txt_tokens'
]


def t2i_collate(inputs):
    """
    Return:
    :img_feat     (batch_size, height, weight, 3)
    :txt_tokens   (n, max_txt_len)
    """
    img_feat, txt_tokens = map(list, unzip(inputs))
    batch = {
        'img_feat': img_feat,
        'txt_tokens': txt_tokens,
    }
    return batch